Automatic shut-off for gas-burners.



C. H. SGHENK.

AUTOMATIG SHUT-OFF FOR GAS BURNERS.

APPLIOATION PILED JULY 29, 1913.

1,074,21 1 V Patented Sept. 30, 1913.

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CLEVELAN HSCHENK.

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"- AIiToM ArC-sHUTgoFn Foi sAs-BuBN'ERsI a sten mea s-29,

Be ;it known that I, GLEVELAN H. scheme, a citizen of theUnited States,-residing at i Springfield, in the county of Sangamon and State of Illinois, have invented; a new? and,

`. useful Automatic' shut-Ott for Gas-Burners,`

of which the following is a specificaton.

This invention relates to gas burners and the purpose of the invention is to provide simple and efi'ective means to automatically' shut of? the gas in case the lightisblown out while the gasisturned on e The nvention is illustrated in the anneXed drawing and is hereinafter particularly described ;and the novel features thereof are finally recited in ;the claims, Figure l i's a side elevation of the apparatus; Fig. 2 isa vertical longitudinal section.` through the casng on the line X X of Fg.

land shows in. elevation the parts within 'the casing; and Fig. 3. is an enlarged hori zontaltransverse section on the line-Y Y. of g..;1." Similar reference numerals designate like parts in the different views. i 4

s A service pipe 1 conveys gas from the source of gas-supply to the burner. i A valve 2 having a tapered plug 3 is connected with the pipe- '1. 'The plugf hasa lon'gtudnal bore 3 accommodating gthe stem {1. A polygonal stem 4' is fitted to slide longitudinally in the bore 3% A push button 5'se- .cured at the lower end of the stem serves as a handle for sliding the' stem in the plug and rotating the plug. A nipple 6 connects an elbow 7 withthevalve 2. A valv'; 8 con-' nectdwith the elbow 7 has a taperedhori-j zontal rotative plugf9, e r j An angular lever designated as a whole by the numeral 10 comprises a horizontal member 10 and an upwardly inclined member 10 The lever is connected with and adapted to rotate the plug 9. The horizontal member 10 normally rests on the upper end of the stem 4. The member 10 has a hole 10 adapted to accommodate the spring 13.

'A burner 12 is connected with the valve 8.

The thermostatic controlling device controlling the closing of the valve 8 will now be described A spring 13 has its upper part fixed on the burner 12 and its lower part extends downwardly through the hole 10 Near the lower end of the spring 13 is a shoulder 13. 'When the lever 10 is in its normal position, the free part of the spring extends downwardly through the hole 10.`

i Speclfication of Letters ?atent Pate t dS t,30,1913

1913. s'-i'a No. ?81,710.

The shoulder 13? is below the member 10 and the spring is slightly compressed. A statio-nary rigid metal-,casng 1& incloses the levenlO the spring 13 and the` lower part of the burner 12. The lower end of a coled spring 15 is connected with the outer end of the member IO and its upper end is connected with thecasing 14:. If upward pres- 'sure be applied on the button-5 it will cause the stem l-to. slide upward to raise the member -lo andcause compression of the spring 15, and` when the pressure on the button is discontinued the spring-will act to depress the member 10 and'return the stem et to its `initial position The upward movement of the member-10 will cause downward movement of the member 10 During the downward movement of the member 10 the end 'wall of the holelO acting 'onthe inolined upper surface 13 of the cam13 will cause further compression of thesprng .137 until the member 10 passes. the-lower end of the part 13 whereupon. the spring 13'wi1l act,

to cause the-shoulder 13 to engage the member 10 and hold it in its depressed position. A slightly concave plate 16 of zinc or other metal eXpan sible to a relatively large eX- tent by the application of heat, is supported in thecasing adj acent to the tip of-the burner 12.- The ends of the plate are inclosecontact with the rigid casing which prevents l'ongitudinal movementof the 'plate. Thelateral edges of the plate are* close to but do not touch the side walls of 'the'casiig, in order that the central part of the plate'may be 'freetofmoverearwardly upon the heating of thje pllate and forwardly upon the cooling of i the plate. The front of the plate is slightly concave in order to determine the direction of movement of the 'central part of the plate. When the plate is heated by the flame, the ends of the plate being immovable, the expansion of the metal will cause the plate to buckle inwardly to produce horizontal inward movement of the central part of the plate and the cooling of the plate will cause reverse movement of the plate.

A lever 17 is mounted to oscillate on a pivot 18. Adjacent to the upper end of the lever 17 is a longitudinal slot 17 which accommodates a rivet 19 or equivalent connecting device, connecting the upper part of 'the lever with the central part of the plate 16 in such manner that the buckling of the plate will cause the upper end of the lever to move inward and the slot in the lever will the valves to the burner 12 and the -gas Willpermit slight sliding of the upper part of the lever on the inner face of the plate to prevent bnding of the lever on the plate. When the member 10 is depressed, the lower end of the lever 17 is a little above the upper surface of the member 10.

The operation of the device is as folloWs: Preliminary to lighting the gas the stern 4 Will be pushed upward to move the lever 10 to compress the spring 15 and to open the valve 8. When the stem 4: has been pushed upWard to the full extent it Will be rotated to rotate the plug 3 to open the valve 2 to the desred extent, and both valves being' open, gas from the pipe 1 Will flow through then be lighted. The upward movement of the member 10 Will cause the 'member 10 i copies of this patent may be obtained for five cents each, 'by addres singjhe ftcom nissionerbg leateit, i i

V x .i i .Washington ,D.C." 5 1 W r i r' to move doWnWard until the free end of the member 10 passes-the shoulder 13 and thereupon the spring 13 will act to project the shoulder 13 above the member 10 and the shoulder 13 Wllhold the member 10 in its depressed position and cause the raised member. 10' to keep the spring 15 ,com pressed. The flame from the burner 12 Will heat the plate 16 and cause it to expand and the expandng of the plate 16 Wlll cause the upper end of the lever 17 to move to the left and its lower end to move to the right and compress the spring 13 to disengage the shoulder 13 from the member 10 and release the member 10 so that it Will move slghtly upward and stop against the lower end of the lever 17 and the lever Will then prevent further upward turning of the member 10. If the light be then eX- tnguished Without 'closng the valve 2 the plate 16 will be cooled by the surrounding air'and the cooling Will cause contraction o' the plate and the contractng of the plate 'Will causethe upper end of the lever 17 to move to the right and'the lower end of the lever to move to the left 'out ofthepath of the member 10 and thereupon the spring 15 Will act to push the member 10 down-` e ward and cause the plug 9 to rotateto close the valve 8 and shut off'the, gas( Having fully described my invention What I claim is new and desire to secure by' Letters Patent is:

1. The combination of a burner; a valve controlling the supply ofgas to the burner a first lever adapted tooperatesaid valve; a

first spring adapted to engage' said lever to" keep the valve open; a second spring effective to move said lever to close the valve; a casing in fixed relaton to the burner; an

eXpansible plate mounted'in thecasng and c adaptedto buckle upon the heating' of the plate and move reversely upon the 'cooling' of the plate; and a 'second lever connected With said expansible'plate and adapted to' dsengage said first sprin lever upon the cooling o said* expansible plate. u

from said first 2. The combnation of a first valv 'a'si ing; a plug rotative IlSld valve c asing'; a

stem adapted to slide longitudinally n said plug; a second valve-casing incommunica tion With said first valve-casing; a -plug i rotatve nflsadsecondvalve-casngj; alever j connected With the plugn sad *second valve-casing and operable by said stemgfa burner in communication With said 'se'cond valve-casing; aspring latch adapt'edto en gage said lever; means for releasing said' I spring latch; and a p i g g p mg@ said lever.

'witnesses:` i V p i AnnA CRos'BY,

TRoXnrL.- 

